... for bridge, building and project. We usually use Casting iron, steel, and brass, bronze for our product.You can choose it ... Lathe, Drill Attack, Amphibious Lathe, Laser Cutting LathesMaterialMachiningServiceAluminium, Copper , Steel, Stainless Steel(SUS), Iron, Nylon ,Chilled cast iron, Nodular cast iron(ductile ... the contract signed customers can visit our company and ability. Series steel Hex nuts